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San Lorenzo Maggiore

A Roman market street survives whole under a Franciscan cloister in the middle of the old city, and you walk on its paving.

Greek Foundations • Roman Market • Angevin Church • One Stair Between Them

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Your Perfect Visit

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Location: Piazza San Gaetano

On the ancient main street, in the middle of the centro storico

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Duration: About Two Hours

Excavations, cloister, church and the site museum

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Underfoot: A Roman Street

Paving, shop counters and vaults, not a reconstruction

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Not the Tunnels

A different site from Napoli Sotterranea, and shallower

🏛️ Why Visit

One stair takes you from a thirteenth-century cloister onto a Roman street with the shops still standing either side of it. Nowhere else in Naples puts the layers that close together, and it is quieter than anything else this good in the centro storico.

📜 A Little History

The market began as Greek work in the fifth or fourth century BC and was rebuilt by the Romans as a macellum, a covered food market with a tholos in the courtyard. A mudslide buried it in the fifth century AD, an early Christian basilica went up over the top, and the Franciscans replaced that from the late thirteenth century. About half the market is still under the modern city.

💡 Did You Know?

Boccaccio wrote that he first saw Fiammetta in this church; the date is usually given as 1338. Seven hundred years earlier, people were buying dinner about four metres below where he was standing.

Ground Level

The Complex Above

A Franciscan church, a cloister and a frescoed hall, all of it standing on a Roman market.

A long frescoed barrel-vaulted hall in the San Lorenzo Maggiore complex, Naples. — **The Frescoed Hall**A long barrel vault painted end to end, part of the monastic complex beside the church. The building has been in continuous use for seven centuries and looks it, in the best way.

A stone wellhead in the arcaded cloister of San Lorenzo Maggiore, Naples. — **The Cloister**The convent cloister with its stone wellhead, arcades on two levels and a marble figure over the far arch. The excavations open off one corner of it.

Below the Cloister

Going Down

A stair from the cloister drops you out of the thirteenth century and into the first.

A modern metal stair descending into the lit excavations beneath San Lorenzo Maggiore. — **The Stair**The way in, a modern flight bolted against ancient walling, with the excavation lit below.

Quarried tuff and later stone masonry meeting in a wall below San Lorenzo Maggiore. — **Cut From the Tuff**Quarried rock and later masonry meeting in one wall. Naples is built out of the ground it stands on and this is where you can see the seam.

A low arched passage running off from the excavations under San Lorenzo Maggiore. — **The Low Passage**A passage running off under the modern city, with the floor of the excavation raked away below it.

The Cardo

The Market Street

A Roman street about three metres wide, with the market opening off both sides of it.

A paved Roman street with stone slabs running between excavated walls in Naples. — **The Street**You walk on the paving the city walked on. The market began as Greek work in the fifth or fourth century BC and was rebuilt by the Romans as a macellum, a covered food market.

A masonry serving counter standing in a Roman shop below San Lorenzo Maggiore. — **A Counter**A masonry serving counter in one of the shops, cut square and still standing to working height.

A line of brick-arched rooms running off the Roman market street in Naples. — **The Arcade**Seven interconnected rooms run in a line off the street, their brick arches carrying one into the next.

A paved Roman floor with a cut drainage channel below reticulate stone walling. — **Paving and Channel**The floor of one of the rooms, with a drainage channel cut across it and reticulate walling above.

Tabernae

The Shops

Small rooms with counters, identified by what was found in them: a bakery, a laundry, a treasury.

Two adjoining brick-vaulted Roman rooms opening off a market street in Naples. — **Two Rooms**Brick arches opening into adjoining rooms, the vaults intact and the floor swept back to Roman level.

A niche high in the back wall of a Roman shop below San Lorenzo Maggiore. — **The Niche**A niche cut high in the back wall of a shop, above a counter that has lost its facing.

A wall of Roman opus reticulatum, small stones set diagonally in a net pattern. — **Reticulate Corner**Opus reticulatum, small squared stones set diagonally like a net, which is the Roman wall face you can date a building by.

A masonry counter standing beneath a stone arch in a Roman shop in Naples. — **Counter and Arch**Another counter under its arch, the tuff blocks above cut and stacked without mortar joints you can see.

A Roman wall still carrying patches of original plaster below San Lorenzo Maggiore. — **The Plastered Room**A wall still carrying its plaster in patches. One of these rooms has been read as a fullonica, a laundry, and another as the market's treasury.

How It Was Built

Vaults and Stone

The fabric itself: vaults, wall faces and the light they put in them.

A Roman barrel vault springing from reticulate stone walls below Naples. — **The Vault**A barrel vault springing off reticulate walls, holding up whatever the city has built on top of it since.

Roman reticulate stonework with brick courses running through it, in Naples. — **Reticulate and Brick**Two Roman techniques in one elevation: the diagonal net of reticulate work, and brick courses run through it to tie it together.

A deep arched stone recess dramatically lit from below in the Naples excavations. — **The Lit Niche**The site lights a deep arched recess from below, which is a modern choice and an effective one. The mudslide that buried all this came in the fifth century AD and about half the market is still under the city.

Live Prices & Availability

Stay Nearby

🛏️ Sleep on the Ancient Grid

Anywhere in the centro storico puts you a few minutes' walk from the door, and the same lanes hold the presepe workshops, the pizzerias and the other churches worth an hour.

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Local Tips

Do the excavations first while your eyes are fresh, then come up for the cloister and the church. The stair is the whole point of the place and it works better downward.
Take the site museum slowly or skip it. It is pottery in cases and wall text, and it will eat an hour you would rather spend on the street below.
It is cool down there in any season and the floor is uneven Roman paving. Flat shoes, and a layer in summer.
Do not confuse this with the underground tours. Napoli Sotterranea is a different site, far deeper, and a different ticket. Doing both in one day is a good day.

Frequently Asked Questions

Is this the same as the Naples underground?

No. This is an excavated Roman market a few metres under a church, entered by a stair from the cloister. Napoli Sotterranea is a network of quarries and aqueduct channels tens of metres down, on a different ticket and a different street.

What can you actually see down there?

A paved Roman street, a run of interconnected rooms with their counters and vaults, reticulate walling and patches of original plaster. Excavators identified a bakery, a laundry and the market treasury among the shops.

How long does it take?

Two hours covers the excavations, the cloister, the church and a pass through the site museum. Ninety minutes is enough if you keep moving.

Is it hard going?

There is a stair down and back and the Roman floor is uneven, but the route is short and the chambers are open rather than tight. It is nothing like the narrow passages the tunnel tours are known for.

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